Fire in a bottle:

• Use on block: set fire
• Use on entity: set entity on fire
• Use or self: give self fire resistance
• Recipe: Wheat Extract

Air in a bottle:

• Use on block: nothing
• Use on entity: give entity levitation
• Use on self: give self slow falling
• Recipe: Melon Extract, Chorus Extract

Ahh no. I've changed my mind, elements themselves will not do anything.